Cork-grinding machine



(No Model.) 2 SheetsS.heet 1. 0. D. ARMSTRONG.

CORK GRINDING MACHINE.

No. 447,860. Patented Mar. 10,1891.

WITNESSES. INVENTbR.

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2 Sheets-Sheet 2.

(No Model.)

O. D. ARMSTRONG.

UORK GRINDING MACHINE.

No. 447,860. Patente d1VIaJr. 10, 1891.

WITNESSES l VENTOR.

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UNITED ST T S- ATENT IVFFICE.

CHARLES D. ARMSTRONG, OF PITTSBURG, PENNSYLVANIA.

CORK-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 447,860, dated March10, 1891. Application filed October 25, 1890- Serial No. 369,332. (Nomodel.)

To all whom it may concern.-

Be it known thatl, CHARLES D. ARMSTRONG, ofv Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Cork-Grinding Machines, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure 1 is anend elevation of my improved cork-grinding machine. Fig. 2 is a planView of the same. Fig. 3 is a side elevation 5 and Fig. 4 is a verticalsectional View, partially broken away, on the line IV IV of Fig. 2.

Like symbols of reference indicate like parts in each.

In grinding corks the usual method is to first cut the pieces of cork towhat are known as squares or quarters and then grindthese pieces bybringing them in contact with one or more rapidly-revolving disks orgrinding surfaces, the piece being brought in contact first with a diskhaving a coarse grindingsurface and then with another having a finerfinishing-surface.

I will now describe my invention so that others skilled in the art maymanufacture and use the same.

In the drawings, a represents the frame or bed-table of the machine, atone end of which table an adjustably-pivoted standard or housing 17 ismounted, in which a shaft 1), having a belt-wheel c, is journaled. Thisbelt-wheel is formed in two parts, one of which 0' is keyed to theshaft 1) and the other 0 idly mounted on the shaft, so that motion istransferred from the idler to the shaftby shifting the power-belt. Keyedto the inner end of the shaft 1) is a flat disk d, on the inner face ofwhich two concentric grinding-surfaces e f are formed or secured. Thesesurfaces may be of emery-paper or other suitable material,

the outer one e being fine and the inner onef being coarse. Extendingfrom the bed-table a in a line substantially parallel'with the plane ofthe disk (1 is a bracket h, on which a feedtable his adj ustablysecuredlongitudinally by the bolt 1', the table fitting in the bracket with adovetail k. Fitting in a dovetailed slide 712 in the feed-table h is alongitudinally-sliding bracket or table Z, having standards m m, towhich an oscillating or swin gin gcork-holder is journalcd. Thiscork-holder is composed of the counter-weight n, situate below thepivotal point, the two standards 0 0, the standard 0 having astationaljLQllllQkJljQurnaled tothe upper end of the same, the face ofthe chuck being, preferably, serrated and the standard 0 havingltubhlarsleeve q, in whwgitudindlymlhmbleand revoluble rod r is mounted, havinga cl uck p on its in'n'enend similaito the chuck p, and a spiral spring3 encircling the rod and situate between the chuck p and the sleeve q.The purpose of the counter-weight is to keep the swinging cork-holder inan upright position. At the outer end of the rod 0" is a wheel or handle8, by means of which the cork holdin g rod 1" may be rotated, and thestandard 0 having a handle 8 by which the table or bracket Z is movedback and forth in the slide h.

The operation is as follows: One of the squares or quarters of cork isplaced between the chucks p p and is held securely between the chucks bythe force of the springs. The cork-holder is swung or oscillated untilthe cork comes in contact with the grinding-surface f of the disk d,which disk has first been set in motion by the belt-wheel o. Theholding-rod r is then turned by the handle 8 so as to bring the edges orcorners of the cork in contact with the grinding-surface until the corkis ground to the desired shape. The table or bracket Z is then drawnback in the slide h until the cork is brought Within the range of thefinishing grindingsurface e, against which it is brought in a likemanner by tilting the cork-holder.

WVhere it is desired to produce a taper on the cork in grinding, thepivoted standard I) in the table a is adjusted to give the disk (Z theproper angle with the sliding bracket Z. To enable this to be done, thebase 00 of the standard I) is slotted at as, (see Fig. 2,) through whichslots threaded bolts y pass and engage with the bed The table h may alsobe adjusted by the bolt i to conform with the grind ing-surface.

The advantages of my improvement are its efficiency and simplicity.

I am aware that a swinging or oscillating cork-holder, in combinationwith two grind ing-disks having different grinding-surfaces, is not new.

I am also aware that it is old to employ a single grinding-disklhavingtwo concentric annular grinding-surfaces, together with a carriage,which moves in a direction parallel with the face of the disk, and alaterallysliding cork-holder mounted on the carriage. I believe that Iam the first to employ, in combination with a disk having twogrindingsurfaces, at longitudinally-movable table with a cork-holdingframe mounted pivotally on the table and capable of being turnedlaterally on its pivot into contact with the disk. The advantage which Iget from this combination is that it affords to the operator greatdelicacy of touch in moving the cork, enabling it to be pressed againstthe. disk firmly or gently, as may be desired, and to be withdrawninstantly. Owing to the rapid action of the grinding-disk, thesevqualities are very desirable, in that they enable great accuracy to besecured as respects the size and uniformity of the product.

I claim- In a cork-grinding machine, the combination of a grinding-diskhaving an abrasive face, mechanism for rotating said disk, a tablemounted on slides, on which it is longitudinally movable in front of andparallel with the face of the grinding-disk, a swinging corkholdingframe pivotally mounted on said table and movable laterally on its pivottoward the face of said grindingdisk, a rotary corkholder on said frame,and a handle by which the-holder may be turned and the cork moved to orfrom the disk, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand, this 21st day ofOctober, A. D. 1890.

CHARLES D. ARMSTRONG.

Witnesses:

JAMES K. BAKEWELL, H. L. GILL.

